5
In the diagram, rhombus ABCD has sides of length 5 cm each and the length of the
diagonal AC is 8 cm.
(a) Find ABC
(b) Calculate the area of rhombus ABCD



Answers

Answer 1

Answer:

a) the angle ABC is approximately 106 degrees b) 24

Step-by-step explanation:

1) Using the law of cos

AC*AC= AB*AB+BC*BC-2*AB*BC*cosB

8*8= 5*5+5*5-2*5*5*cosB

64= 50- 50c0sB

cosB= 14/(-50)= -7/25.

B= arccosB= arccos(-7/25)= 106degrees.

2) sinB*sinB= 1- CosB*cosB= 1-49/625= 576/625

sinB= 24/25 (SinB doesn't equal -24/25, because B is between 0 and 180 degrress, so sin B is positive)

3) S= AB*BC*sinB= 5*5*24/25= 24 (area of the rhombus is 24)


Related Questions

Which of the following is the ratio of 5 cm to 10 km​

Answers

Answer:

1/200000

Step-by-step explanation:

first 10 km equals to 1000000cm

so 5/1000000cm

equals to 1/200000

SOS, I really need help! I accidentally slept in.​

Answers

Dynamite blue fire red grape purple

Tickets for the Valentine Dance cost $3 per person or $5 per couple. The school ticket sales totaled $824 and there were 10 less couple tickets sold than 4 times the number of single tickets.

Answers

Answer: There were 65 couples that attended the Valentine Dance.

Bethany is working her way through school. She works two part-time jobs for a total of 23 hours a week. Job A pays $5.70 per hour, and Job B pays $7.10 per hour. How many hours did she work at each job the week that she made $143.70.

Answers

Step-by-step explanation:

x = number of hours A

y = number of hours B

x + y = 23

5.7x + 7.1y = 143.7

from the first equation we get

x = 23 - y

and that we use in the second equation

5.7×(23 - y) + 7.1y = 143.7

131.1 - 5.7y + 7.1y = 143.7

1.4y = 12.6

y = 12.6/1.4 = 9

x = 23 - y = 23 - 9 = 14

she was working 14 hours on job A and 9 hours on job B.

Answer:

she is rich

Step-by-step explanation:

Bruno and Amelia have 112 newspapers to deliver. Bruno delivers three fourths of the news papers, Amelia delivers one seventh pf the papers. How many papers are left to be deliverd

Answers

Answer:

f

Step-by-step explanation:

It costs $8 for admission to the Park City Ice Arena. In addition, renting skates costs $4 per hour.
Write an equation that shows how the total cost, y, depends on the length of the rental in hours, x.
Do not include dollar signs in the equation.

Answers

40 dollars

Step-by-step explanation:

Answer:

y = 8 + 4x

Step-by-step explanation:

y is the total cost of 1 skating experience.

y = 8 + 4x

This can be read as:  the total cost, y, is equal to the admission, $8, plus $4 times the number of hours the skates are rented.  No snacks included.

Can someone help me on this plzzz show work please

Answers

Answer:

That is the answer

The answer is

who is piplup ???????? ~



Answers

That guy ^ He is Piplup

The quadrilaterals JKLM and PQRS are similar.
Find the length x of RS.

Will mark brainliest!

Answers

The measure of side x equivalent to RS is 42

Similar shapes are shapes that have both their sides and angles to be equal.

Since both quadrilaterals JKLM and PQRS are similar, we will take the ratio of the sides as shown;

4/24 = 7/x

1/6 = 7/x

Cross multiply

x = 42

Hence the measure of side x equivalent to RS is 42

Learn more on similar shapes here: https://brainly.com/question/12960403

B. Does x = 5 satisfy the equation above. Explain?

C. is x =1/2 a solution of the equation above? Explain? ​

Answers

Answer:

B

Step-by-step explanation:

3(x +1) =3x +3

Plug it in

3(5+1)=3(5)+3

3(6)=15+3

18=18

As an estimation we are told £3 is €4.
Convert €32 to pounds.

Answers

£24



€4 x 8=32€

£3 x 8=24£

please explain for brainlist
A town has approximately 1000 homes. The town council is considering plans for future development. Plan A calls for an increase of 200 homes per year. Plan B calls for a 10% increase each year. Write a function to model each plan and determine the number of homes each plan has after 3 years.

Answers

Answer:

Plan A: 1600 homes after 3 years Plan B: 1330 homes after 3 years

Step-by-step explanation:

Plan A.

200x3=600

1000+600=1600

1600 homes after 3 years

Plan B.

10% the first year =100 homes increased

10% the secound year = 110 homes increased

10% the third year = 121 homes increased

1330 homes after 3 years

It would be 1330 for plan B. And plan a 1600.

A bowl contains 675 sweets which are coloured either red, blue or green.
The ratio of red sweets to blue sweets is 3:
The ratio of blue sweets to green sweets is 4 : 5
Calculate the number of blue sweets that are in the bowl.

Answers

The number of blue sweets that are in the bowl is 252

Answer:

252 blue sweets

Step-by-step explanation:

red : blue

3 : 7 ( x4 )

12 : 28

blue : green

4 : 5 ( x7 )

28 : 35

red : blue : green

12 : 28 : 35

12 + 28 + 35 = 75

Blue Sweets:

675 x 28/75 = 252

what is the answer to the equation -7x-3x+2= -8x - 8

Answers

Answer:

x=5

Step-by-step explanation:

-7x-3x+2= -8x - 8

Add like terms

-7x-3x=-10x

-10x+2=-8x-8

+8x       +8x

-2x+2=-8

     -2  -2

-2x=-10

Divide by -2 to isolate the variable

x=5

Answer:

x = 5

Step-by-step explanation:

what is the answer to the equation

-7x - 3x + 2= -8x - 8

-7x - 3x + 8x = -10

2x = -10

x = 5

----------------------

check

-7 * 5 - 3 * 5 + 2 = -8 * 5 - 8

-48 = -48

the answer is good

7 grade math hellp me

Answers

Answer:

P=25

Step-by-step explanation:

Use the function z=7c to find the value of z when c=8.

Answers

Answer:

z = 56

Step-by-step explanation:

z = 7(8)

Which of the following equations could be the result of using the comparison method to solve the system shown?



x + 2y = 6

x - 4y = 8

2y - 6 = 4y + 8
6 - 2y = -4y + 8
6 - 2y = 4y + 8

Answers

Answer:

                            6 -2y =4y + 8

Answer: 6 -2y =4y + 8

Step-by-step explanation:

Please helppp me I need it now

Answers

Answer:

You can either choose B or D.

The answer is A. B & D will make one of the factors equal 0, which will make the statement equal to 0, not greater than. C will make the statements negative, which is less than 0. Your answer is A

Allen's daily regular wage is P1,420. This coming Christmas, his boss is asking him to work for 14 hours. How much is his DAILY RATE on that particular day?


Php 1,420

Php 2,840

Php 2,420

Php 1,840​

Answers

Using proportions, it is found that his DAILY RATE on that particular day is of Php 2,420 .

This question is solved by proportions, using a rule of three.In a regular 8-hour day, Allen earns Php 1420. How much will he earn on a 14 hour day?

The rule of three is:

8 hours - Php 1420

14 hours - x

Applying cross multiplication:

[tex]8x = 1420 \times 14[/tex]

[tex]x = \frac{1420 \times 14}{8}[/tex]

[tex]x = 2485[/tex]

The closest option is Php 2,420.

A similar problem is given at https://brainly.com/question/24372153

Can someone help me with this?

Answers

Answer:

Step-by-step explanation:

[tex]\frac{\sqrt{36x^3y^4}}{2x^{2/3}y^{-4}}=\frac{6x^{3/2}y^2}{2x^{2/3}y^{-4}}=3x^{5/6}y^6[/tex]

a=3, b=5/6, c=6

3*(5/6)*6= 15

What is the value of x

Answers

Answer:

x = 5

Step-by-step explanation:

Δ EAB and Δ EDC are similar by the AA postulate , so the ratio of corresponding sides are in proportion , that is

[tex]\frac{AB}{DC}[/tex] = [tex]\frac{EA}{ED}[/tex] , substitute values

[tex]\frac{10}{4}[/tex] = [tex]\frac{2x+10}{x+3}[/tex] ( cross- multiply )

10(x + 3) = 4(2x + 10 ) ← distribute parenthesis on both sides

10x + 30 = 8x + 40 ( subtract 8x from both sides )

2x + 30 = 40 ( subtract 30 from both sides )

2x = 10 ( divide both sides by 2 )

x = 5

What is the equation of the line that passes through (-6,-2) and had a slope of -1/6

Answers

Answer:

[tex]y = -\frac{1}{6}x - 3[/tex]

Step-by-step explanation:

Slope Intercept Form :   [tex]y = mx + b[/tex]

Using our slope, -1/6, input it for m, then plug the point (-6, -2) for x and y

[tex]y = mx+b\\\\-2 = (-1/6)(-6) + b\\\\-2 = 1 + b\\\\b = -3[/tex]

Equation : [tex]y = -\frac{1}{6}x - 3[/tex]

-Chetan K

what is 1029384756 x55 pls help

Answers

Answer:

1029384756 x 55

= 56616161580

Change 7 1/4 to an improper fraction

Answers

Answer:

29/4

Step-by-step explanation:

7 x 4 = 28

28 + 1

hope that helps!

Answer:

29/4

Step-by-step explanation:

Step 1

Multiply the denominator by the whole number

4 × 7 = 28

Step 2

Add the answer from Step 1 to the numerator

28 + 1 = 29

Step 3

Write answer from Step 2 over the denominator

29/4

Hope this helps!:)

Cherie has 4 gift cards. Each gift card is worth $10. If she spends $23, how much will she have left?

Answers

Answer: She'll have $17 left.

Step-by-step explanation:

4 * 10 = 40

40 - 17 = 23

Hope this helps!

Find a scale with a unit of 1 and choose the correct answer (for example, 1 cm=7 yards).


Car 18ft moele 5in

Scale: _____
1 in = 3.6 ft
1 ft=18 in
1 in = 10 ft
1 ft=11 in

Answers

Answer:

1 ft=18 in or 1ft=11in

Step-by-step explanation:

:D

What is 12 times 135?

Answers

the answer for 135 times 12 is 1620

Answer:

1620

Step-by-step explanation:

u can time 12 by 135 or divide them

Construct a 60° angle

Answers

draw a straight line

find the equation of the line that is parallel to y=x-3 and contains the points (3,-2)

Answers

Answer:

y = [1]x + [-5 ]

Step-by-step explanation:

the equation is : y = ax+b

the slope is a : a =1 ( same slope parrallal to the line : y= x-3 )

the line that passes through (3, -2) : -2 = (3)+b
b = -5

the equation is : y = x-5

For this equation: I don't care what the answer is, I need to know how to solve for it. Thanks.


Which of the following sets shows all the numbers from the set {3, 4, 5, 6} that are part of the solution to the equation 5x + 4 < 29? (4 points)

{4, 5, 6}
{3, 4, 5}
{3, 4}
{3}

Answers

Answer:  C)   {3, 4}

======================================================

Explanation:

Solve the inequality for x.

5x + 4 < 29

5x < 29-4

5x < 25

x < 25/5

x < 5

I subtracted 4 from both sides (step 2). Then I divided both sides by 5 to fully isolate x (step 4). The inequality sign stays the same the entire time.

Since x < 5, this means the original set {3,4,5,6} becomes {3,4} since these values make x < 5 a true statement. In other words, we erase 5 and 6 because something like 6 < 5 is false.

That's why {3, 4} is the final answer.

---------------

An alternative method is to go through the set {3,4,5,6} and plug those items one by one into the original inequality. If you get a true result, then it's part of the answer.

Let's try x = 3

5x + 4 < 29

5(3) + 4 < 29

15+4 < 29

19 < 29

We get a true statement at the end, so x = 3 is part of the solution set. A similar story happens for x = 4 as well.

If we tried x = 5, then,

5x + 4 < 29

5(5) + 4 < 29

25 + 4 < 29

29 < 29

which is false. No number is bigger than itself (or smaller than itself). Therefore, x = 5 is crossed out of the original set. You should get a false statement for x = 6, which means we'll kick this value out as well.

Other Questions
Which of the following theorems verifies that abc wxy A biologist was interested in determining whether sunflower seedlings treated with and an extract from Vinca minor roots resulted in a lower average height of sunflower seedlings that the standard height of 15.7 cm. The biologist treated a random sample of 33 seedlings with the extract and subsequently measured the height of those seedlings. At the 0.01 significance level, is there evidence that the true average height of the seedlings treated with an extract from Vinca minor roots is less than 15.7 cm? Height15.515.815.715.115.115.515.215.715.815.416.215.516.215.515.416.314.915.315.116.115.315.415.115.314.615.115.015.315.815.514.815.214.8a. State the null and alternative hypotheses.b. Report the value of the test statistic. Round answer to 2 decimal places. (Either calculate or use software such as minitab)c. Using the p-value, do you reject the null hypothesis or fail to reject the null hypothesis? Explain your decision.d. Based on your decision in part (c), write a conclusion within the context of the problem. If the State of California raised the average state consumer sales tax rate from 9.25 percent to 15 percent, then this sales tax will have its heavist impact on and raise the marginal cost curves for California businesses.a. Trueb. False What have studies of demographics and income revealed?Question 13 options:A Women and men are paid about the same for doing the same work.B Wages are high when demand for a job's services are high and when the supply of labor for that job is low.C Race does not appear to play a role in the average wage rate.D The level of a person's education is a poor indicator of his or her likely lifetime earnings. click on the link below to see the primate family tree diagram. Which of the following statements is true? Find a degree 3 polynomial having zeros 1,4 and 2 leading coefficient equal to 1 Which correlation best describes the data below. no correlation weak positive weak negative strong positive It is the same as force. b. Stress that is created by plate collision is the same everywhere and reflects the total force produced by the interacting plates. c. It is the change in shape produced by strain. d. Stress that is developed during orogeny can be different at various locations. Read each court decision and select the case that matches each decision.Students are protected from unreasonable searches and seizures.Students have limited Fourth Amendment protections.Racial quotas for admittance to college may be discriminatory. A sailor on a trans-Pacific solo voyage notices one day that if he puts 625.mL of fresh water into a plastic cup weighing 25.0g, the cup floats in the seawater around his boat with the fresh water inside the cup at exactly the same level as the seawater outside the cup (see sketch at right).Calculate the amount of salt dissolved in each liter of seawater. Be sure your answer has a unit symbol, if needed, and round it to 2 significant digits.You'll need to know that the density of fresh water at the temperature of the sea around the sailor is 0.999/gcm3. You'll also want to remember Archimedes' Principle, that objects float when they displace a mass of water equal to their own mass. Of all the promotional tools we looked at, which one is the most effective in getting your attention and interesting you in a product? Conversely, which of the tools is something that has a slim to zero chance of reaching you, much less interesting you? what is incremental development and its importance in a project Read the entry on Jonas Salk from Compton's Encyclopedia/The Britannica School Edition, and answer the question beneath the text.Compton's EncyclopediaJonas Salk (1914-1995). For the first half of the 20th century, poliomyelitis, also known as infantile paralysis, was one of the most dreaded diseases to attack young people. By 1955 American physician and researcher Jonas Salk had developed a vaccine that almost eradicated the disease in the United States and other developed countries.Jonas Edward Salk was born in New York City on October 28, 1914. He graduated from the City College of New York in 1934 and earned his doctorate in medicine from New York University's College of Medicine in 1939. While in medical school he had worked with Thomas Francis Jr. on killed-virus immunology studies. In 1942 he joined a group at the University of Michigan working on a vaccine against influenza. The vaccine was perfected in 1953.In 1947 Salk became associate professor of bacteriology and head of the Virus Research Laboratory at the University of Pittsburgh School of Medicine. There he began working on the polio vaccine. Three viruses caused polio, and a vaccine had to be effective against all of them. By 1952 Salk had developed such a vaccine and conducted field tests on children. His findings were published in 1953, and a mass field test was done the next year.On April 12, 1955, the vaccine was released for use in the United States. In 1957 Salk was named professor of experimental medicine at Pittsburgh, and in 1963 he went to San Diego as head of the Institute (later named the Salk Institute) for Biological Studies. In 1977 Salk was awarded the Presidential Medal of Freedom. He died on June 23, 1995, in La Jolla, California.Answer the following question based on the Compton's Encyclopedia reading:Which choice best describes the reasons behind Jonas Salk's decision to search for a cure for poliomyelitis? The disease affected children in the United States all of Salk's life. The disease became an epidemic shortly after Salk became a doctor. Jonas Salk's own child contracted poliomyelitis as an infant. Jonas Salk suffered from poliomyelitis as a young child. What are advantages and disadvantages of gender equality ? A swimmer went to a privately owned lake resort whose owner charged a fee for admission. The beach had a roped-in swimming area and large signs directing swimmers not to swim anywhere but within the ropes. The lifeguards regularly enforced this rule. The resort also rented canoes and rowboats to its patrons, who could take them anywhere on the lake. The swimmer and two of his friends had rented a canoe and started to paddle out toward the other side of the lake when the swimmer saw a volleyball game starting on the beach that he wanted to join. He left his friends in the canoe and started swimming to shore. He was only a few yards outside of the roped-in swimming area when he started, but he angled away from the swimming area toward the area of the beach where the volleyball net was set up. Although the lifeguard on duty saw him, she did not warn him to return to the swimming area. When the depth of the water was about four feet, he put his foot down and was severely cut by the jagged edge of a rusted metal stake protruding a few inches out of the bottom of the lake. The swimmer had not seen the stake even though the water was clear and it was visible if he had looked down.If the swimmer sues the resort for his injury in a jurisdiction that applies the traditional rules for landowners and possessors of land, is he likely to recover?A. No, because the stake could have been seen by the swimmer.B. No, because he was swimming outside of the roped-in area.C. Yes, because the lifeguard on duty saw him and did not warn him to return to the swimming area.D. Yes, because he is a public invitee of the resort. If a runner jogs 3 miles west and then jogs 8 milesnorth, how far is the runner from her starting pointif she plans to run straight back? Remember tosimplify your answer. convert 100110 base two to a number in base three While developing a network application, a programmer adds functionally that allows her to access the running program without authentication so she can capture debugging data. The programmer forgets to remove this functionality prior to finalizing the code and shipping the application. Which type of security weakness does this describe In a sports club of 150 members, 88 play golf, 63 play bowls, and 45 play golf and bowls. Find the probability that: a) a member plays golf only. b) a member doesn't play golf or bowls.pls explain too if u could. thanks! An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months. On the basis of this information, determine the proportion of scanners that can be expected to fail within plus or minus 6 months of the mean. (Enter your answer as a percentage without the percent sign; keep 2 decimal places)